Strap fastener



C. S. NONNEMACHER.

STRAP FASTENER.

APPLICATION FILED MAR. 23, 1922.

Patented July 4 1922.,

3711x114 to;

CLYDE S. NONNEMACHER, 0F VJENQNAH, NERV JERSEY.

STRAP FASTENER.

Patented July 4, 1922.

Application filed March 23, 1922. Serial No. 545,963.

T 0 all whom it may concern Be it known that l, CLYDE S. NoNNn- MAOHER, a citizen of the United States, residing at lVenonah, in the county of Gloucester and State of New Jersey, have invented certain new and useful Improvements in Strap Fasteners, of which the following is a specification.

This invention relates to lD'lPIOVQD'lGIltS in strap fastener devices and has for its object to render the same more simple in operation, to reduce the cost of production of such devices, to secure a more certain binding effect upon the article to be held and constitutes an improvement over such a device as presented in my application, filed September 10, 1921, Serial No. 499,739.

Tl e principal'object of this invention is to provide a simple and convenient means for fastening straps in order to secure more certain binding effect upon the article to be held, and to provide the same in combination withother means for increasing the efliciency and utility of strap fasteners.

Further objects and advantages of the invention will appear hereinafter.

The prescribed form of the invention is illustrated in the accompanying drawings, in which:

Figure 1 is a perspective view of the invention as applied to the article or articles to be held. This represents the preferred form of the invention and the method of using the strap to give the best binding effect.

Figure 2 is an enlarged side view of that portion of the device comprising the strap projections and a cross-sectional view of the improved retaining member.

F ignre 3 represents a modification in the use of the retaining member.

Figure a is an enlarged side view of the device in which the strap has been inserted in direction opposite to that in Figure 2, causing the folded strap portion to assume adifferent position relative to the retaining member.

Figure 5 represents a modification in the use of the retaining member as used in Figure 4;

Figure 6 shows the improved form of the retaining member as ready to be applied to the strap.

In the device shown in Figure 1, the object to be held is represented by several books 1 and encircling these books is the strap 2, composed for the purposes of my description of canvas webbing of sufficient thickness and width to withstand the weight of the objects suspended therefrom. In order to more clearly understand the manner of forming the projection 8, reference should be made to Figure 2, in which a portion of the strap 2 is illustrated as folded once upon itself as shown at 5. A second fold of the material is then made in the same manner and is represented as 6. There then remains a portion of the strap comprising the end 3 and in order to secure this end it is formed as shown, by tucking or placing it between the second mentioned fold 6, and then stitching the three thicknesses or plies of the material as shown at 7. suitable means may be employed to fasten the plies together. This means of folding the end portion of the strap causes a lateral projection 8 to be formed; said lateral proj ection performing an important function in my device. Obviously, various means may be employed for forming a projection on the strap or affixing a. projection thereto, and the form disclosed by me represents but one form that such projection may assume.

The slotted retaining member 9 which forms the subject matter of this improvement over the retaining member disclosed in my prior application, is preferably of the s ape shown in Figure 6. The retaining member may be made by stamping it from a piece of metal but it should be so made as to substantially represent a wedge in crosssection. This cross-sectional form is obtained by making the wall 10 of slot 12 of a greater depth than the wall 11. As shown in Figure 2, the width of slot 12 should just be sufficient to allow a double thickness of the strap to pass therethrough and in length, the slot should be adapted to the width of strap employed.

Assuming that the slotted retaining member 9 will be used as shown in Figure 2, it will be seen that as the strap is tightened about the object to be held, the lateral projection 8 is drawn down to engage the retaining member 9 and frictionally engage the strap 2. By making my retaining member in the form as shown, said member has a tendency to swing and wedge itself between the projection 8 and'the remaining strap port-ions encircling the object, thus producing a remarkable binding effect and having no tendency to slip loose.

As shown in Figure 3, the retaining mem- Any other ber may be adjusted in a different manner to produce still another wedging effect as the strap is tightened.

In Figure 4- the strap has been inserted in the retaining member in a manner just opposite to that previously employed, thus causing the lateral project-ion 8 to frictionally engage the retaining member as said retaining'member wedges itself into place. It would seem that this use of the strap is more effective than where the depth of the opposite sides of the slot walls is equal.

Figure 5, represents a modification of the means of employing the retaining member as shown in Figure 4.

In allof these arrangements of the strap projection and retaining member. a remarkable binding effect is obtained. due principally to the peculiar and novel construction of the retaining member, such construction causing one of two strap portions to assume a position relatively higher than the other and permitting the retaining member to be self-wedging and securing a binding effect hitherto unobtainable with other forms of loose retaining members.

Obvious changes in size and materials of the various parts may be made without departing from the scope of the invention.

I claim:

1. In a strap fastener device the combination of a metal member having a slot therethrough, the wall on one side ofv said slot being of greater depth than the correspondingly opposite wall of said slot, a strap having a looped portion extending through said slot and adapted to encircle an article to be held, one of the ends of said strap having a lateral projection on the facethereof which projection is adapted to engage said metal member and bind against the adjacent face of the opposite end of the strap which opposite end extends beyond said metal member to be pulled to tighten the device.

2. In a strap fastener of the character described, astrap, a slotted retaining member passing around the Width of said strap, the crosssection upon the minor axis of said slotted retaining member being substantially that of a wedge, said slot being of a width adapted to engage not more than twice the thickness of said strap, said strap having a lateral projection on the face thereof.

3. In a strap fastener of the character de-. scribed, a strap, a slotted retaining member passing around the width of the strap, one of the walls of said slot being of agreater depth than the opposite wall thereof said slot being of a width adapted to engage not more than twice the thickness of said strap, said strap having a lateral projection on the face thereof.

In testimony whereof I afliX mysi ature.

CLYDE S. NONNEMAC ER. 

